No its not simple, well kinda yea but still lol.. '97-'00 you can pull the fuse and/or heat sync, '01-'03, it doesn't work via the fuse.. unless ur gonna tell me that when I pull my fuse and get the constant clicking of auto headlights is normal... the heat sink works to kill drl's but not autolights...
And the 70% isn't BS.. anyone who knows about electrical in any gm vehicle, knows that drl's function at less lower power and it's a pulsated signal... if your car is off and you turn your lights on, why will your ballasts buzz? You have a relay hooked up to you battery that is 12V, but yet, they'll still buzz until you turn the car on.. why is that then??... I know what the harness' function is and primarily, they are used to protect your factory wiring... and also pull power from the battery... but at startup! Not for the duration that the drl's are on.. Some vehicles might be able to power up HID systems normally without problems. The inrush load can be up to max 13 amps per ballast, compared to 7amps inrush when using halogen/stock bulbs. The factory design parameters for headlight circuits are usually 7 amps inrush and 4.5 amps continuous load. So over time, connectors, multifunction switch, headlight switch, wiring and fuse holders will slowly degrade, because of heat buildup. (I have 2 relay harness' on my SS, but you should still kill drl's to prolong the life of the bulb and ballast), obviousy the harness doesn't matter in the OP's case.. he is having problems with it and without it.. so its either a bad relay, , ballasts, bulb, or something else... just because yours work doesn't mean others do... each car is different and each HID manufacturer is different...
To the OP, hope you can figure things out.. I have VVME 35W HID's low's and fog's in my SS, had them for over 2 years now w/zero issues..
Edit: while jogging today, noticed that later model GP's have drl's in the bumpers and are orange... so drl's wouldn't matter/cause issues... and also going off of what TJeno posted... my apologies for the confusion...